@theme-color:#000;//主题字体颜色
@theme-bgcolor:#EBF5FD; //主题背景颜色
@app-header-height:40px;//头部导航栏高度
@app-foot-bar-height:40px;//底部导航栏高度
@app-foot-bar-bgColor:#000;//底部导航栏颜色
@app-foot-bar-font-color:#fff;//底部导航栏字体颜色

.flex {
    display: flex;
  }
  
  .flex-row {
    display    : flex;
    align-items: center;
  }
  
  .flex-center {
    .flex-row();
    justify-content: center;
  }
  
  .flex-between {
    .flex-row();
    justify-content: space-between;
  }
  
  .flex-around {
    
    justify-content: space-around;
  }
  
  .flex-column {
    display       : flex;
    flex-direction: column;
  }
  
  .justify-end {
    justify-content: flex-end;
  }
  
  .align-end {
    align-items: flex-end;
  }
  